77996364915 has 64 divisors (see below), whose sum is σ = 144860562432. Its totient is φ = 35097753600.

The previous prime is 77996364869. The next prime is 77996364917. The reversal of 77996364915 is 51946369977.

It is a happy number.

It is not a de Polignac number, because 77996364915 - 2¹⁰ = 77996363891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77996364917) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3983700 + ... + 4003230.

It is an arithmetic number, because the mean of its divisors is an integer number (2263446288).

Almost surely, 2^77996364915 is an apocalyptic number.

77996364915 is a deficient number, since it is larger than the sum of its proper divisors (66864197517).

77996364915 is a wasteful number, since it uses less digits than its factorization.

77996364915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20140.

The product of its digits is 77157360, while the sum is 66.

The spelling of 77996364915 in words is "seventy-seven billion, nine hundred ninety-six million, three hundred sixty-four thousand, nine hundred fifteen".